Related Questions
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Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the __________ equation.
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__________ does not change during phase transformation processes like sublimation, melting & vaporisation.
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The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
C. Does not change in volume
D. Either (A), (B) or (C)
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Refrigeration capacity of a household refrigerator may be round about __________ tons.
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__________ increases with increase in pressure.
A. The melting point of wax
B. The boiling point of a liquid
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Ideal gas law is applicable at
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The first law of thermodynamics is a statement of conservation of
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Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)
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Enthalpy of a gas depends upon its
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Critical temperature is defined as the temperature above which a gas will
A. Not liquify (barring exceptions)
C. Never liquify however high the pressure may be
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When a gas is subjected to adiabatic expansion, it gets cooled due to
B. Decrease in temperature
C. Decrease in kinetic energy
D. Energy spent in doing work
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Specific volume of an ideal gas is
B. The reciprocal of its density
C. Proportional to pressure
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A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P1 and P2. (where, P1 and P2 are initial and final pressures respectively)
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The principle applied in liquefaction of gases is
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Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will
D. First fall and then rise
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In an ideal refrigeration cycle, the change in internal energy of the fluid is
D. Either of the above three; depends on the nature of refrigerant
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Ideal refrigeration cycle is
B. Same as reverse Carnot cycle
C. Dependent on the refrigerant's properties
D. The least efficient of all refrigeration processes
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__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.
D. A combination of separating & throttling
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During adiabatic expansion of gas
A. Pressure remains constant
C. Temperature remains constant
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At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.
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Melting of wax is accompanied with __________ in entropy.
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Pick out the Clausius-Clapeyron equation from the following:
B. ln P = - (ΔH/RT) + constant
C. ΔF = ΔH + T [∂(ΔF)/∂T]P
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For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
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Pick out the correct statement.
A. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase
B. A process is irreversible as long as Δ S for the system is greater than zero
C. The mechanical work done by a system is always equal to∫P.dV
D. The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants
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4
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the
A. Low pressure and high temperature
B. Low pressure and low temperature
C. High pressure and low temperature
D. High pressure and high temperature
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In any spontaneous process,
C. Both F and A decreases
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For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be
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The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by
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Which of the following is Virial equation of state?
A. (p + a/V2)(V - b) = nRT
C. PV = A + B/V + C/V2 + D/V3 + ...
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At absolute zero temperature, the __________ of the gas is zero.